There two that are very similar, the first one is priced at 40m, and it has a +19minimum. Everything else pretty much the same.
The second one, has 10 more vitality, but no +minimum damage, it is priced at 10m.

It seems to be comparable to, if not better than legendaries that are going for 300 million minimum. I was a little surprised when I got it.

If Goku's power level increases at the same rate till the end of DBGT as it does till the end of the Frieza saga, as a SS4 Goku would have a PL of roughly 939 Quinoctogintillion. For reference that is a 260 digit number. A PL of 14,600 is required to destroy an earth sized planet. There are about 2 nonillion earths worth of mass in the universe. That means SS4 Goku can destroy the universe about 32 Octosexagintillion times over. There's a reason they made Goku a god at the end of GT.

There two that are very similar, the first one is priced at 40m, and it has a +19minimum. Everything else pretty much the same.
The second one, has 10 more vitality, but no +minimum damage, it is priced at 10m.

Immortal King is always worth selling. Unfortunately, yours has randomed health regen which isn't very useful. Even the most worthless rolls on IK armour are still worth many millions though, as the IK set has all the best stats built in. All it can random is even -better- stats.